[backport] Fixes cut sentences in the generated scaladocs

This commit changes all first sentences of library functions which
contain `i.e.` or `e.g.` and adds a `,` to prevent that the scaladoc
summary sentence is cut after this abbreviation.

This is possible as pull/3824 fixed how Scaladoc parses the first
sentence of a method description into a sumary sentence(now the first
sentence has to end with a dot followed by whitespace).

Only docs in the core library are changed (src/library/**/*.scala)
and only if they occur in the first sentence.

Review by @heathermiller

(cherry picked from commit 72721ff5dd06dea1235ecb71acae0bd61aee4814)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/library/scala/util/Properties.scala b/src/library/scala/util/Properties.scala
index 2daa4de9a6..8835730d95 100644
--- a/src/library/scala/util/Properties.scala
+++ b/src/library/scala/util/Properties.scala
@@ -107,7 +107,7 @@ private[scala] trait PropertiesTrait {
   val versionString         = "version " + scalaPropOrElse("version.number", "(unknown)")
   val copyrightString       = scalaPropOrElse("copyright.string", "Copyright 2002-2013, LAMP/EPFL")
 
-  /** This is the encoding to use reading in source files, overridden with -encoding
+  /** This is the encoding to use reading in source files, overridden with -encoding.
    *  Note that it uses "prop" i.e. looks in the scala jar, not the system properties.
    */
   def sourceEncoding        = scalaPropOrElse("file.encoding", "UTF-8")