[DOC] Remove _emphasis_ in code blocks which is not handled as emphasis anymore (#15901)

7 files changed, 56 insertions, 56 deletions

diff --git a/complex.c b/complex.c
index 7b6c6c2a99..85d724f273 100644
--- a/complex.c
+++ b/complex.c
@@ -1803,7 +1803,7 @@ rb_dbl_complex_new(double real, double imag)
  *   Complex.rect(1, Rational(0, 1)).to_i # => 1
  *
  * Raises RangeError if <tt>self.imag</tt> is not exactly zero
- * (either <tt>Integer(0)</tt> or <tt>Rational(0, _n_)</tt>).
+ * (either <tt>Integer(0)</tt> or <tt>Rational(0, n)</tt>).
  */
 static VALUE
 nucomp_to_i(VALUE self)
@@ -1827,7 +1827,7 @@ nucomp_to_i(VALUE self)
  *   Complex.rect(1, Rational(0, 1)).to_f # => 1.0
  *
  * Raises RangeError if <tt>self.imag</tt> is not exactly zero
- * (either <tt>Integer(0)</tt> or <tt>Rational(0, _n_)</tt>).
+ * (either <tt>Integer(0)</tt> or <tt>Rational(0, n)</tt>).
  */
 static VALUE
 nucomp_to_f(VALUE self)
@@ -1852,7 +1852,7 @@ nucomp_to_f(VALUE self)
  *   Complex.rect(1, 0.0).to_r            # => (1/1)
  *
  * Raises RangeError if <tt>self.imag</tt> is not exactly zero
- * (either <tt>Integer(0)</tt> or <tt>Rational(0, _n_)</tt>)
+ * (either <tt>Integer(0)</tt> or <tt>Rational(0, n)</tt>)
  * and <tt>self.imag.to_r</tt> is not exactly zero.
  *
  * Related: Complex#rationalize.
diff --git a/dir.rb b/dir.rb
index 0088bb39fa..eb1a408ee3 100644
--- a/dir.rb
+++ b/dir.rb
@@ -319,14 +319,14 @@ class Dir
   #
   #     Dir.glob('io.?') # => ["io.c"]
   #
-  # - <tt>'[_set_]'</tt>: Matches any one character in the string _set_;
+  # - <tt>'[set]'</tt>: Matches any one character in the string _set_;
   #   behaves like a {Regexp character class}[rdoc-ref:Regexp@Character+Classes],
   #   including set negation (<tt>'[^a-z]'</tt>):
   #
   #     Dir.glob('*.[a-z][a-z]').take(3)
   #     # => ["CONTRIBUTING.md", "COPYING.ja", "KNOWNBUGS.rb"]
   #
-  # - <tt>'{_abc_,_xyz_}'</tt>:
+  # - <tt>'{abc,xyz}'</tt>:
   #   Matches either string _abc_ or string _xyz_;
   #   behaves like {Regexp alternation}[rdoc-ref:Regexp@Alternation]:
   #
@@ -388,10 +388,10 @@ class Dir
   #
   # - File::FNM_EXTGLOB:
   #   enables the pattern extension
-  #   <tt>'{_a_,_b_}'</tt>, which matches pattern _a_ and pattern _b_;
+  #   <tt>'{a,b}'</tt>, which matches pattern _a_ and pattern _b_;
   #   behaves like a
   #   {regexp union}[rdoc-ref:Regexp.union]
-  #   (e.g., <tt>'(?:_a_|_b_)'</tt>):
+  #   (e.g., <tt>'(?:a|b)'</tt>):
   #
   #     pattern = '{LEGAL,BSDL}'
   #     Dir.glob(pattern)      # => ["LEGAL", "BSDL"]
diff --git a/doc/_regexp.rdoc b/doc/_regexp.rdoc
index 301a3fe11b..aa55a7eebf 100644
--- a/doc/_regexp.rdoc
+++ b/doc/_regexp.rdoc
@@ -414,21 +414,21 @@ Each of these anchors matches a boundary:
 
 Lookahead anchors:
 
-- <tt>(?=_pat_)</tt>: Positive lookahead assertion:
+- <tt>(?=pat)</tt>: Positive lookahead assertion:
   ensures that the following characters match _pat_,
   but doesn't include those characters in the matched substring.
 
-- <tt>(?!_pat_)</tt>: Negative lookahead assertion:
+- <tt>(?!pat)</tt>: Negative lookahead assertion:
   ensures that the following characters <i>do not</i> match _pat_,
   but doesn't include those characters in the matched substring.
 
 Lookbehind anchors:
 
-- <tt>(?<=_pat_)</tt>: Positive lookbehind assertion:
+- <tt>(?<=pat)</tt>: Positive lookbehind assertion:
   ensures that the preceding characters match _pat_, but
   doesn't include those characters in the matched substring.
 
-- <tt>(?<!_pat_)</tt>: Negative lookbehind assertion:
+- <tt>(?<!pat)</tt>: Negative lookbehind assertion:
   ensures that the preceding characters do not match
   _pat_, but doesn't include those characters in the matched substring.
 
@@ -574,7 +574,7 @@ A simple regexp has (at most) one match:
   re.match('1943-02-04').size # => 1
   re.match('foo')             # => nil
 
-Adding one or more pairs of parentheses, <tt>(_subexpression_)</tt>,
+Adding one or more pairs of parentheses, <tt>(subexpression)</tt>,
 defines _groups_, which may result in multiple matched substrings,
 called _captures_:
 
@@ -647,8 +647,8 @@ A regexp may contain any number of groups:
 
 - For a large number of groups:
 
-  - The ordinary <tt>\\_n_</tt> notation applies only for _n_ in range (1..9).
-  - The <tt>MatchData[_n_]</tt> notation applies for any non-negative _n_.
+  - The ordinary <tt>\\n</tt> notation applies only for _n_ in range (1..9).
+  - The <tt>MatchData[n]</tt> notation applies for any non-negative _n_.
 
 - <tt>\0</tt> is a special backreference, referring to the entire matched string;
   it may not be used within the regexp itself,
@@ -661,7 +661,7 @@ A regexp may contain any number of groups:
 
 As seen above, a capture can be referred to by its number.
 A capture can also have a name,
-prefixed as <tt>?<_name_></tt> or <tt>?'_name_'</tt>,
+prefixed as <tt>?<name></tt> or <tt>?'name'</tt>,
 and the name (symbolized) may be used as an index in <tt>MatchData[]</tt>:
 
   md = /\$(?<dollars>\d+)\.(?'cents'\d+)/.match("$3.67")
@@ -676,7 +676,7 @@ When a regexp contains a named capture, there are no unnamed captures:
   /\$(?<dollars>\d+)\.(\d+)/.match("$3.67")
   # => #<MatchData "$3.67" dollars:"3">
 
-A named group may be backreferenced as <tt>\k<_name_></tt>:
+A named group may be backreferenced as <tt>\k<name></tt>:
 
   /(?<vowel>[aeiou]).\k<vowel>.\k<vowel>/.match('ototomy')
   # => #<MatchData "ototo" vowel:"o">
@@ -732,10 +732,10 @@ see {Atomic Group}[https://www.regular-expressions.info/atomic.html].
 
 ==== Subexpression Calls
 
-As seen above, a backreference number (<tt>\\_n_</tt>) or name (<tt>\k<_name_></tt>)
+As seen above, a backreference number (<tt>\\n</tt>) or name (<tt>\k<name></tt>)
 gives access to a captured _substring_;
 the corresponding regexp _subexpression_ may also be accessed,
-via the number (<tt>\\g<i>n</i></tt>) or name (<tt>\g<_name_></tt>):
+via the number n (<tt>\\gn</tt>) or name (<tt>\g<name></tt>):
 
   /\A(?<paren>\(\g<paren>*\))*\z/.match('(())')
   # ^1
@@ -768,12 +768,12 @@ See {Subexpression calls}[https://learnbyexample.github.io/Ruby_Regexp/groupings
 
 ==== Conditionals
 
-The conditional construct takes the form <tt>(?(_cond_)_yes_|_no_)</tt>, where:
+The conditional construct takes the form <tt>(?(cond)yes|no)</tt>, where:
 
 - _cond_ may be a capture number or name.
 - The match to be applied is _yes_ if _cond_ is captured;
   otherwise the match to be applied is _no_.
-- If not needed, <tt>|_no_</tt> may be omitted.
+- If not needed, <tt>|no</tt> may be omitted.
 
 Examples:
 
@@ -802,7 +802,7 @@ The absence operator is a special group that matches anything which does _not_ m
 
 ==== Unicode Properties
 
-The <tt>/\p{_property_name_}/</tt> construct (with lowercase +p+)
+The <tt>/\p{property_name}/</tt> construct (with lowercase +p+)
 matches characters using a Unicode property name,
 much like a character class;
 property +Alpha+ specifies alphabetic characters:
@@ -1033,23 +1033,23 @@ See also {Extended Mode}[rdoc-ref:Regexp@Extended+Mode].
 
 Each of these modifiers sets a mode for the regexp:
 
-- +i+: <tt>/_pattern_/i</tt> sets
+- +i+: <tt>/pattern/i</tt> sets
   {Case-Insensitive Mode}[rdoc-ref:Regexp@Case-Insensitive+Mode].
-- +m+: <tt>/_pattern_/m</tt> sets
+- +m+: <tt>/pattern/m</tt> sets
   {Multiline Mode}[rdoc-ref:Regexp@Multiline+Mode].
-- +x+: <tt>/_pattern_/x</tt> sets
+- +x+: <tt>/pattern/x</tt> sets
   {Extended Mode}[rdoc-ref:Regexp@Extended+Mode].
-- +o+: <tt>/_pattern_/o</tt> sets
+- +o+: <tt>/pattern/o</tt> sets
   {Interpolation Mode}[rdoc-ref:Regexp@Interpolation+Mode].
 
 Any, all, or none of these may be applied.
 
 Modifiers +i+, +m+, and +x+ may be applied to subexpressions:
 
-- <tt>(?_modifier_)</tt> turns the mode "on" for ensuing subexpressions
-- <tt>(?-_modifier_)</tt> turns the mode "off" for ensuing subexpressions
-- <tt>(?_modifier_:_subexp_)</tt> turns the mode "on" for _subexp_ within the group
-- <tt>(?-_modifier_:_subexp_)</tt> turns the mode "off" for _subexp_ within the group
+- <tt>(?modifier)</tt> turns the mode "on" for ensuing subexpressions
+- <tt>(?-modifier)</tt> turns the mode "off" for ensuing subexpressions
+- <tt>(?modifier:subexp)</tt> turns the mode "on" for _subexp_ within the group
+- <tt>(?-modifier:subexp)</tt> turns the mode "off" for _subexp_ within the group
 
 Example:
 
@@ -1166,22 +1166,22 @@ A regular expression containing non-US-ASCII characters
 is assumed to use the source encoding.
 This can be overridden with one of the following modifiers.
 
-- <tt>/_pat_/n</tt>: US-ASCII if only containing US-ASCII characters,
+- <tt>/pat/n</tt>: US-ASCII if only containing US-ASCII characters,
   otherwise ASCII-8BIT:
 
     /foo/n.encoding     # => #<Encoding:US-ASCII>
     /foo\xff/n.encoding # => #<Encoding:ASCII-8BIT>
     /foo\x7f/n.encoding # => #<Encoding:US-ASCII>
 
-- <tt>/_pat_/u</tt>: UTF-8
+- <tt>/pat/u</tt>: UTF-8
 
     /foo/u.encoding # => #<Encoding:UTF-8>
 
-- <tt>/_pat_/e</tt>: EUC-JP
+- <tt>/pat/e</tt>: EUC-JP
 
     /foo/e.encoding # => #<Encoding:EUC-JP>
 
-- <tt>/_pat_/s</tt>: Windows-31J
+- <tt>/pat/s</tt>: Windows-31J
 
     /foo/s.encoding # => #<Encoding:Windows-31J>
 
diff --git a/doc/language/encodings.rdoc b/doc/language/encodings.rdoc
index ee7f224f2b..683842d3fb 100644
--- a/doc/language/encodings.rdoc
+++ b/doc/language/encodings.rdoc
@@ -393,7 +393,7 @@ These keyword-value pairs specify encoding options:
 
   - <tt>:replace: nil</tt> (default): Set replacement string to default value:
     <tt>"\uFFFD"</tt> ("�") for a Unicode encoding, <tt>'?'</tt> otherwise.
-  - <tt>:replace: _some_string_</tt>: Set replacement string to the given +some_string+;
+  - <tt>:replace: some_string</tt>: Set replacement string to the given +some_string+;
     overrides +:fallback+.
 
   Examples:
@@ -407,12 +407,12 @@ These keyword-value pairs specify encoding options:
   One of these may be specified:
 
   - <tt>:fallback: nil</tt> (default): No replacement fallback.
-  - <tt>:fallback: _hash_like_object_</tt>: Set replacement fallback to the given
-    +hash_like_object+; the replacement string is <tt>_hash_like_object_[X]</tt>.
-  - <tt>:fallback: _method_</tt>: Set replacement fallback to the given
-    +method+; the replacement string is <tt>_method_(X)</tt>.
-  - <tt>:fallback: _proc_</tt>: Set replacement fallback to the given
-    +proc+; the replacement string is <tt>_proc_[X]</tt>.
+  - <tt>:fallback: hash_like_object</tt>: Set replacement fallback to the given
+    +hash_like_object+; the replacement string is <tt>hash_like_object[X]</tt>.
+  - <tt>:fallback: method</tt>: Set replacement fallback to the given
+    +method+; the replacement string is <tt>method(X)</tt>.
+  - <tt>:fallback: proc</tt>: Set replacement fallback to the given
+    +proc+; the replacement string is <tt>proc[X]</tt>.
 
   Examples:
 
diff --git a/doc/language/globals.md b/doc/language/globals.md
index 83a024b141..ece950d3d8 100644
--- a/doc/language/globals.md
+++ b/doc/language/globals.md
@@ -21,16 +21,16 @@ require 'English'
 
 ### Matched \Data
 
-|   Variable    |      \English       | Contains                          | Initially | Read-Only | Reset By        |
-|:-------------:|:-------------------:|-----------------------------------|:---------:|:---------:|-----------------|
-|     `$~`      | `$LAST_MATCH_INFO`  | \MatchData object or `nil`        |   `nil`   |    No     | Matcher methods |
-|     `$&`      |      `$MATCH`       | Matched substring or `nil`        |   `nil`   |    No     | Matcher methods |
-|   `` $` ``    |    `$PRE_MATCH`     | Substring left of match or `nil`  |   `nil`   |    No     | Matcher methods |
-|     `$'`      |    `$POST_MATCH`    | Substring right of match or `nil` |   `nil`   |    No     | Matcher methods |
-|     `$+`      | `$LAST_PAREN_MATCH` | Last group matched or `nil`       |   `nil`   |    No     | Matcher methods |
-|     `$1`      |                     | First group matched or `nil`      |   `nil`   |   Yes     | Matcher methods |
-|     `$2`      |                     | Second group matched or `nil`     |   `nil`   |   Yes     | Matcher methods |
-| <tt>$_n_</tt> |                     | <i>n</i>th group matched or `nil` |   `nil`   |   Yes     | Matcher methods |
+| Variable  |      \English       | Contains                          | Initially | Read-Only | Reset By        |
+|:---------:|:-------------------:|-----------------------------------|:---------:|:---------:|-----------------|
+|   `$~`    | `$LAST_MATCH_INFO`  | \MatchData object or `nil`        |   `nil`   |    No     | Matcher methods |
+|   `$&`    |      `$MATCH`       | Matched substring or `nil`        |   `nil`   |    No     | Matcher methods |
+| `` $` ``  |    `$PRE_MATCH`     | Substring left of match or `nil`  |   `nil`   |    No     | Matcher methods |
+|   `$'`    |    `$POST_MATCH`    | Substring right of match or `nil` |   `nil`   |    No     | Matcher methods |
+|   `$+`    | `$LAST_PAREN_MATCH` | Last group matched or `nil`       |   `nil`   |    No     | Matcher methods |
+|   `$1`    |                     | First group matched or `nil`      |   `nil`   |   Yes     | Matcher methods |
+|   `$2`    |                     | Second group matched or `nil`     |   `nil`   |   Yes     | Matcher methods |
+|   `$n`    |                     | <i>n</i>th group matched or `nil` |   `nil`   |   Yes     | Matcher methods |
 
 ### Separators
 
@@ -167,7 +167,7 @@ English - `$LAST_PAREN_MATCH`.
 
 ### `$1`, `$2`, \Etc. (Matched Group)
 
-For <tt>$_n_</tt> the <i>n</i>th group of the match.
+For <tt>$n</tt> the <i>n</i>th group of the match.
 
 No \English.
 
@@ -282,9 +282,9 @@ by Kernel#load and Kernel#require.
 Singleton method `$LOAD_PATH.resolve_feature_path(feature)`
 returns:
 
-- <tt>[:rb, _path_]</tt>, where `path` is the path to the Ruby file to be
+- <tt>[:rb, path]</tt>, where `path` is the path to the Ruby file to be
   loaded for the given `feature`.
-- <tt>[:so, _path_]</tt>, where `path` is the path to the shared object file
+- <tt>[:so, path]</tt>, where `path` is the path to the shared object file
   to be loaded for the given `feature`.
 - `nil` if there is no such `feature` and `path`.
 
diff --git a/file.c b/file.c
index 867b041a44..809253fab0 100644
--- a/file.c
+++ b/file.c
@@ -7963,11 +7963,11 @@ Init_File(void)
      *
      * ==== File::FNM_EXTGLOB
      *
-     * Flag File::FNM_EXTGLOB enables pattern <tt>'{_a_,_b_}'</tt>,
+     * Flag File::FNM_EXTGLOB enables pattern <tt>'{a,b}'</tt>,
      * which matches pattern '_a_' and pattern '_b_';
      * behaves like
      * a {regexp union}[rdoc-ref:Regexp.union]
-     * (e.g., <tt>'(?:_a_|_b_)'</tt>):
+     * (e.g., <tt>'(?:a|b)'</tt>):
      *
      *   pattern = '{LEGAL,BSDL}'
      *   Dir.glob(pattern)      # => ["LEGAL", "BSDL"]
diff --git a/test/ruby/sentence.rb b/test/ruby/sentence.rb
index 9bfd7c7599..99ced05d2f 100644
--- a/test/ruby/sentence.rb
+++ b/test/ruby/sentence.rb
@@ -211,7 +211,7 @@ class Sentence
   # returns new sentence object which
   # _target_ is substituted by the block.
   #
-  # Sentence#subst invokes <tt>_target_ === _string_</tt> for each
+  # Sentence#subst invokes <tt>target === string</tt> for each
   # string in the sentence.
   # The strings which === returns true are substituted by the block.
   # The block is invoked with the substituting string.