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+To: vim_dev@googlegroups.com
+Subject: Patch 7.4.915
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.4.915
+Problem:    When removing from 'path' and then adding, a comma may go missing.
+            (Malcolm Rowe)
+Solution:   Fix the check for P_ONECOMMA. (closes #471)
+Files:      src/option.c, src/testdir/test_options.in, 
+            src/testdir/test_options.ok
+
+
+*** ../vim-7.4.914/src/option.c	2015-11-10 13:30:34.999047749 +0100
+--- src/option.c	2015-11-10 17:46:36.191651303 +0100
+***************
+*** 4883,4891 ****
+  				{
+  				    i = (int)STRLEN(origval);
+  				    /* strip a trailing comma, would get 2 */
+! 				    if (comma && (flags & P_ONECOMMA) && i > 1
+! 					            && origval[i - 1] == ','
+! 						    && origval[i - 2] != '\\')
+  					i--;
+  				    mch_memmove(newval + i + comma, newval,
+  							  STRLEN(newval) + 1);
+--- 4883,4892 ----
+  				{
+  				    i = (int)STRLEN(origval);
+  				    /* strip a trailing comma, would get 2 */
+! 				    if (comma && i > 1
+! 					  && (flags & P_ONECOMMA) == P_ONECOMMA
+! 					  && origval[i - 1] == ','
+! 					  && origval[i - 2] != '\\')
+  					i--;
+  				    mch_memmove(newval + i + comma, newval,
+  							  STRLEN(newval) + 1);
+*** ../vim-7.4.914/src/testdir/test_options.in	2014-04-01 14:08:14.685074130 +0200
+--- src/testdir/test_options.in	2015-11-10 17:45:50.096107003 +0100
+***************
+*** 10,15 ****
+--- 10,21 ----
+  :endtry
+  :buf 1
+  :$put =caught
++ :"
++ :" Test that changing 'path' keeps two commas.
++ :set path=foo,,bar
++ :set path-=bar
++ :set path+=bar
++ :$put =&path
+  :/^result/,$w! test.out
+  :qa!
+  ENDTEST
+*** ../vim-7.4.914/src/testdir/test_options.ok	2014-04-01 14:08:14.685074130 +0200
+--- src/testdir/test_options.ok	2015-11-10 17:46:07.283937094 +0100
+***************
+*** 1,2 ****
+--- 1,3 ----
+  result
+  ok
++ foo,,bar
+*** ../vim-7.4.914/src/version.c	2015-11-10 15:17:59.166278487 +0100
+--- src/version.c	2015-11-10 17:48:31.650509518 +0100
+***************
+*** 743,744 ****
+--- 743,746 ----
+  {   /* Add new patch number below this line */
++ /**/
++     915,
+  /**/
+
+-- 
+There's no place like $(HOME)!
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
+///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\  an exciting new programming language -- http://www.Zimbu.org        ///
+ \\\            help me help AIDS victims -- http://ICCF-Holland.org    ///