formatters: new conga formatter, renamed formatters for consistency. (t…

…alonhub#1355)

previously:
 - SLASH_SEPARATED includes a prefix slash, unlike other *_SEPARATED.

now:
 - renamed SLASH_SEPARATED to ALL_SLASHES
 - added new SLASH_SEPARATED matching *_SEPARATED behavior.
 - added new command `conga` (for 'conga line') for SLASH_SEPARATED.

core/text/formatters.py

@@ -160,7 +160,8 @@ def every_word(word_func):
     "SPACE_SURROUNDED_STRING": (SEP, surround(" ")),
     "DOT_SEPARATED": words_with_joiner("."),
     "DOT_SNAKE": (NOSEP, lambda i, word, _: "." + word if i == 0 else "_" + word),
-    "SLASH_SEPARATED": (NOSEP, every_word(lambda w: "/" + w)),
+    "ALL_SLASHES": (NOSEP, every_word(lambda w: "/" + w)),
+    "SLASH_SEPARATED": words_with_joiner("/"),
     "CAPITALIZE_FIRST_WORD": (
         SEP,
         first_vs_rest(lambda w: title_case()(0, w, True)),
@@ -180,7 +181,8 @@ def every_word(word_func):
     "kebab": "DASH_SEPARATED",
     "packed": "DOUBLE_COLON_SEPARATED",
     "padded": "SPACE_SURROUNDED_STRING",
-    "slasher": "SLASH_SEPARATED",
+    "slasher": "ALL_SLASHES",
+    "conga": "SLASH_SEPARATED",
     "smash": "NO_SPACES",
     "snake": "SNAKE_CASE",
     "string": "SINGLE_QUOTED_STRING",