bin/erb: improve documentation of -P flag

man/erb.1: ditto

[Bug #15421]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66419 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

bin/erb

@@ -114,9 +114,9 @@ class ERB
   -d               set $DEBUG to true
   -r library       load a library
   -E ex[:in]       set default external/internal encodings
-  -U               set default encoding to UTF-8.
+  -U               set default encoding to UTF-8
   -T trim_mode     specify trim_mode (0..2, -)
-  -P               ignore lines which start with "%"
+  -P               disable ruby code evaluation for lines beginning with %
   var=value        set variable
 EOU
         exit 1

man/erb.1

@@ -1,5 +1,5 @@
 .\"Ruby is copyrighted by Yukihiro Matsumoto <matz@netlab.jp>.
-.Dd October 21, 2017
+.Dd December 16, 2018
 .Dt ERB \&1 "Ruby Programmer's Reference Guide"
 .Os UNIX
 .Sh NAME
@@ -45,9 +45,8 @@ You can omit the one for internal encodings, then the value
 .Pf ( Li "Encoding.default_internal" ) will be nil.
 .Pp
 .It Fl P
-Evaluates lines starting with
-.Li "%"
-as Ruby code and removes the tailing EOLs.
+Disables ruby code evaluation for lines beginning with
+.Li "%" .
 .Pp
 .It Fl S Ar level
 Specifies the safe level in which eRuby script will run.