erlang: remove spaces before parens in UltiSnips

This is almost never seen in common Erlang style, and was inconsistent
with the Snipmate snippets for Erlang.

Adds a list comprehension snippet, as a bonus.

UltiSnips/erlang.snippets

@@ -5,11 +5,11 @@
 priority -50
 
 snippet pat "Case:Receive:Try Clause"
-${1:pattern}${2: when ${3:guard}} ->;
+${1:pattern}${2: when ${3:guard}} ->
 	${4:body}
 endsnippet
 
-snippet beh "Behaviour Directive"
+snippet beh "Behaviour Directive" b
 -behaviour(${1:behaviour}).
 endsnippet
 
@@ -20,11 +20,11 @@ case ${1:expression} of
 end
 endsnippet
 
-snippet def "Define Directive"
+snippet def "Define Directive" b
 -define(${1:macro}${2: (${3:param})}, ${4:body}).
 endsnippet
 
-snippet exp "Export Directive"
+snippet exp "Export Directive" b
 -export([${1:function}/${2:arity}]).
 endsnippet
 
@@ -47,23 +47,23 @@ if
 end
 endsnippet
 
-snippet ifdef "Ifdef Directive"
+snippet ifdef "Ifdef Directive" b
 -ifdef(${1:macro}).
 endsnippet
 
-snippet ifndef "Ifndef Directive"
+snippet ifndef "Ifndef Directive" b
 -ifndef(${1:macro}).
 endsnippet
 
-snippet imp "Import Directive"
+snippet imp "Import Directive" b
 -import(${1:module}, [${2:function}/${3:arity}]).
 endsnippet
 
-snippet inc "Include Directive"
+snippet inc "Include Directive" b
 -include("${1:file}").
 endsnippet
 
-snippet mod "Module Directive"
+snippet mod "Module Directive" b
 -module(${1:`!p snip.rv = snip.basename or "module"`}).
 endsnippet
 
@@ -77,7 +77,7 @@ ${6:after
 end
 endsnippet
 
-snippet rec "Record Directive"
+snippet rec "Record Directive" b
 -record(${1:record}, {${2:field}${3: = ${4:value}}}).
 endsnippet
 
@@ -93,8 +93,16 @@ ${13:after
 end
 endsnippet
 
-snippet undef "Undef Directive"
+snippet undef "Undef Directive" b
 -undef(${1:macro}).
 endsnippet
 
+snippet || "List Comprehension"
+[${1:X} || ${2:X} <- ${3:List}${4:, gen}]
+endsnippet
+
+snippet gen "Generator Expression"
+${1:X} <- ${2:List}${3:, gen}
+endsnippet
+
 # vim:ft=snippets: