[DOC] Missing comment markers

dir.c

@@ -3357,7 +3357,7 @@ dir_s_each_child(int argc, VALUE *argv, VALUE io)
  *   "main.rb"
  *
  * If no block is given, returns an enumerator.
-  */
+ */
 static VALUE
 dir_each_child_m(VALUE dir)
 {

enum.c

@@ -4936,11 +4936,11 @@ enum_compact(VALUE obj)
  * - #group_by: Returns a Hash that partitions the elements into groups.
  * - #partition: Returns elements partitioned into two new Arrays, as determined by the given block.
  * - #slice_after: Returns a new Enumerator whose entries are a partition of +self+,
-     based either on a given +object+ or a given block.
+ *   based either on a given +object+ or a given block.
  * - #slice_before: Returns a new Enumerator whose entries are a partition of +self+,
-     based either on a given +object+ or a given block.
+ *   based either on a given +object+ or a given block.
  * - #slice_when: Returns a new Enumerator whose entries are a partition of +self+
-     based on the given block.
+ *   based on the given block.
  * - #chunk: Returns elements organized into chunks as specified by the given block.
  * - #chunk_while: Returns elements organized into chunks as specified by the given block.
  *

file.c

@@ -1773,7 +1773,7 @@ rb_file_blockdev_p(VALUE obj, VALUE fname)
  *
  * Returns +true+ if +filepath+ points to a character device, +false+ otherwise.
  *
-  *  File.chardev?($stdin)     # => true
+ *   File.chardev?($stdin)     # => true
  *   File.chardev?('t.txt')     # => false
  *
  */

include/ruby/internal/intern/bignum.h

@@ -793,7 +793,7 @@ size_t rb_absint_size(VALUE val, int *nlz_bits_ret);
  * @exception   rb_eTypeError  `val` doesn't respond to `#to_int`.
  * @retval      (size_t)-1     Overflowed.
  * @retval      otherwise
-                `((val_numbits * CHAR_BIT + word_numbits - 1) / word_numbits)`,
+ *              `((val_numbits * CHAR_BIT + word_numbits - 1) / word_numbits)`,
  *              where val_numbits is the number of bits of `abs(val)`.
  * @post        If  `nlz_bits_ret` is  not  `NULL` and  there  is no  overflow,
  *              `(return_value * word_numbits - val_numbits)`   is  stored   in

include/ruby/thread.h

@@ -243,7 +243,7 @@ typedef struct rb_internal_thread_event_hook rb_internal_thread_event_hook_t;
  * @return     An opaque pointer to the hook, to unregister it later.
  * @note       This functionality is a noop on Windows.
  * @note       The callback will be called without the GVL held, except for the
-               RESUMED event.
+ *             RESUMED event.
  * @warning    This function MUST not be called from a thread event callback.
  */
 rb_internal_thread_event_hook_t *rb_internal_thread_add_event_hook(

math.c

@@ -731,7 +731,7 @@ rb_math_sqrt(VALUE x)
  *    cbrt(1.0)       # => 1.0
  *    cbrt(0.0)       # => 0.0
  *    cbrt(1.0)       # => 1.0
-      cbrt(2.0)       # => 1.2599210498948732
+ *    cbrt(2.0)       # => 1.2599210498948732
  *    cbrt(8.0)       # => 2.0
  *    cbrt(27.0)      # => 3.0
  *    cbrt(INFINITY)  # => Infinity

numeric.c

@@ -999,7 +999,7 @@ num_negative_p(VALUE num)
  *  - #/: Returns the quotient of +self+ and the given value.
  *  - #ceil: Returns the smallest number greater than or equal to +self+.
  *  - #coerce: Returns a 2-element array containing the given value converted to a \Float
-      and +self+
+ *    and +self+
  *  - #divmod: Returns a 2-element array containing the quotient and remainder
  *    results of dividing +self+ by the given value.
  *  - #fdiv: Returns the \Float result of dividing +self+ by the given value.
@@ -1683,12 +1683,12 @@ rb_dbl_cmp(double a, double b)
  *  Examples:
  *
  *    2.0 <=> 2              # => 0
-      2.0 <=> 2.0            # => 0
-      2.0 <=> Rational(2, 1) # => 0
-      2.0 <=> Complex(2, 0)  # => 0
-      2.0 <=> 1.9            # => 1
-      2.0 <=> 2.1            # => -1
-      2.0 <=> 'foo'          # => nil
+ *    2.0 <=> 2.0            # => 0
+ *    2.0 <=> Rational(2, 1) # => 0
+ *    2.0 <=> Complex(2, 0)  # => 0
+ *    2.0 <=> 1.9            # => 1
+ *    2.0 <=> 2.1            # => -1
+ *    2.0 <=> 'foo'          # => nil
  *
  *  This is the basis for the tests in the Comparable module.
  *

range.c

@@ -2488,7 +2488,7 @@ range_overlap(VALUE range, VALUE other)
  * - #%: Requires argument +n+; calls the block with each +n+-th element of +self+.
  * - #each: Calls the block with each element of +self+.
  * - #step: Takes optional argument +n+ (defaults to 1);
-     calls the block with each +n+-th element of +self+.
+ *   calls the block with each +n+-th element of +self+.
  *
  * === Methods for Converting
  *

string.c

@@ -6487,7 +6487,7 @@ rb_str_to_i(int argc, VALUE *argv, VALUE str)
  *  Returns the result of interpreting leading characters in +self+ as a Float:
  *
  *    '3.14159'.to_f  # => 3.14159
-      '1.234e-2'.to_f # => 0.01234
+ *    '1.234e-2'.to_f # => 0.01234
  *
  *  Characters past a leading valid number (in the given +base+) are ignored:
  *