help.lint.spaces: new vocab

basis/help/lint/spaces/authors.txt

@@ -0,0 +1 @@
+Alexander Ilin

basis/help/lint/spaces/spaces.factor

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+! Copyright (C) 2017 Alexander Ilin.
+! See http://factorcode.org/license.txt for BSD license.
+USING: arrays combinators.short-circuit formatting io
+io.directories.search io.encodings.utf8 io.files io.pathnames
+kernel math namespaces prettyprint sequences ui.gadgets.panes
+vocabs.loader ;
+
+IN: help.lint.spaces
+
+: all-docs-files ( -- seq )
+    vocab-roots get [
+        recursive-directory-files [ "-docs.factor" tail? ] filter
+    ] map concat ;
+
+: lint-spaces ( -- )
+    all-docs-files [
+        dup utf8 file-lines [ 1 + 2array ] map-index
+        [
+            first [
+                { [ CHAR: space = ] [ CHAR: " = ] } 1||
+            ] trim-head
+            "  " swap subseq?
+        ] filter
+        [ drop ] [
+            swap <pathname> .
+            [ first2 swap "%d: %s\n" printf ] each
+        ] if-empty
+    ] each ;