Fix for #5022 -- Escaped newlines should be elided

This was a regression, not covered by a test; previously the string

    "foo\
    bar"

would be interpreded as "foobar" but this was changed to "foo\\\nbar" in
2.6.x with my string interpolation refactor.  This change restores the
behaviour.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/puppet/parser/lexer.rb b/lib/puppet/parser/lexer.rb
index 9036d652e..31d39ae2f 100644
--- a/lib/puppet/parser/lexer.rb
+++ b/lib/puppet/parser/lexer.rb
@@ -522,13 +522,14 @@ class Puppet::Parser::Lexer
     # backslash; the caret is there to match empty strings
     str = @scanner.scan_until(/([^\\]|^|[^\\])([\\]{2})*[#{terminators}]/) or lex_error "Unclosed quote after '#{last}' in '#{rest}'"
     @line += str.count("\n") # literal carriage returns add to the line count.
-    str.gsub!(/\\(.)/) {
+    str.gsub!(/\\(.)/m) {
       ch = $1
       if escapes.include? ch
         case ch
         when 'n'; "\n"
         when 't'; "\t"
         when 's'; " "
+        when "\n": ''
         else      ch
         end
       else