add examples for string/triml

Author: rwtolbert

examples/string_47triml.janet

@@ -0,0 +1,8 @@
+# trim leading/left side whitespace
+(string/triml "  foo ") # -> "foo "
+
+# default whitespace includes " \t\r\n\v\f"
+(string/triml "\t bar\n\r\f") # -> "bar\n\r\f"
+
+# provide custom set of characters to triml
+(string/triml "_.foo_bar. \n" " ._\n") # -> "foo_bar. \n"