lint: Allow synopses that start with an abbreviation.

* guix/scripts/lint.scm (starts-with-abbreviation?): New procedure.
  (check-synopsis-style)[check-start-with-package-name]: Use it.
* tests/lint.scm ("synopsis: start with abbreviation"): New test.

guix/scripts/lint.scm

@@ -80,6 +80,10 @@
 (define (properly-starts-sentence? s)
   (string-match "^[(\"'[:upper:][:digit:]]" s))
 
+(define (starts-with-abbreviation? s)
+  "Return #t if S starts with what looks like an abbreviation or acronym."
+  (string-match "^[A-Z][A-Z0-9]+\\>" s))
+
 (define (check-description-style package)
   ;; Emit a warning if stylistic issues are found in the description of PACKAGE.
   (define (check-not-empty description)
@@ -180,7 +184,8 @@ line."
                     'synopsis)))
 
   (define (check-start-with-package-name synopsis)
-    (when (regexp-exec (package-name-regexp package) synopsis)
+    (when (and (regexp-exec (package-name-regexp package) synopsis)
+               (not (starts-with-abbreviation? synopsis)))
       (emit-warning package
                     "synopsis should not start with the package name"
                     'synopsis)))

tests/lint.scm

@@ -202,6 +202,16 @@
                    (synopsis "Arbitrary precision"))))
         (check-synopsis-style pkg))))))
 
+(test-assert "synopsis: start with abbreviation"
+  (string-null?
+   (call-with-warnings
+    (lambda ()
+      (let ((pkg (dummy-package "uucp"
+                   ;; Same problem with "APL interpreter", etc.
+                   (synopsis "UUCP implementation")
+                   (description "Imagine this is Taylor UUCP."))))
+        (check-synopsis-style pkg))))))
+
 (test-assert "inputs: pkg-config is probably a native input"
   (->bool
    (string-contains