Fix other usages of \n in sed replacements.

share/functions/__fish_complete_command.fish

@@ -2,7 +2,11 @@ function __fish_complete_command --description 'Complete using all available com
 	set -l ctoken (commandline -ct)
 	switch $ctoken
 	case '*=*'
-		set ctoken (echo $ctoken  | sed 's/=/\n/')
+        # Some seds (e.g. on Mac OS X), don't support \n in the RHS
+        # Use a literal newline instead
+        # http://sed.sourceforge.net/sedfaq4.html#s4.1
+		set ctoken (echo $ctoken  | sed 's/=/\\
+/')
 		printf '%s\n' $ctoken[1]=(complete -C$ctoken[2])
 	case '*'
 		complete -C$ctoken

share/functions/__fish_complete_lpr_option.fish

@@ -5,7 +5,11 @@ function __fish_complete_lpr_option --description 'Complete lpr option'
 		set -l IFS =
 		echo $optstr | read -l opt val
 		set -l descr
-		for l in (lpoptions -l ^ /dev/null | grep $opt | sed 's+\(.*\)/\(.*\):\s*\(.*\)$+\2 \3+; s/ /\n/g;')
+		# Some seds (e.g. on Mac OS X), don't support \n in the RHS
+		# Use a literal newline instead
+		# http://sed.sourceforge.net/sedfaq4.html#s4.1
+		for l in (lpoptions -l ^ /dev/null | grep $opt | sed 's+\(.*\)/\(.*\):\s*\(.*\)$+\2 \3+; s/ /\\
+/g;')
 			if not set -q descr[1]
 				set descr $l
 				continue

share/functions/__fish_print_make_targets.fish

@@ -1,4 +1,8 @@
 function __fish_print_make_targets
 	set files Makefile makefile GNUmakefile
-	sgrep -h -E '^[^#%=$[:space:]][^#%=$]*:([^=]|$)' $files | cut -d ":" -f 1 | sed -e 's/^ *//;s/ *$//;s/  */\n/g' ^/dev/null
+	# Some seds (e.g. on Mac OS X), don't support \n in the RHS
+	# Use a literal newline instead
+	# http://sed.sourceforge.net/sedfaq4.html#s4.1
+	sgrep -h -E '^[^#%=$[:space:]][^#%=$]*:([^=]|$)' $files | cut -d ":" -f 1 | sed -e 's/^ *//;s/ *$//;s/  */\\
+/g' ^/dev/null
 end