fix tests

tests/fsharp/typecheck/sigs/neg03.bsl

@@ -106,7 +106,7 @@ neg03.fs(103,9,103,14): typecheck error FS0025: Incomplete pattern matches on th
 
 neg03.fs(106,15,106,17): typecheck error FS0025: Incomplete pattern matches on this expression. For example, the value '[0]' may indicate a case not covered by the pattern(s).
 
-neg03.fs(148,23,148,26): typecheck error FS0003: This value is not a function and cannot be applied
+neg03.fs(148,23,148,26): typecheck error FS0003: This value is not a function and cannot be applied.
 
 neg03.fs(151,9,151,23): typecheck error FS0002: This function takes too many arguments, or is used in a context where a function is not expected
 

tests/fsharp/typecheck/sigs/neg66.vsbsl

@@ -3,4 +3,4 @@ neg66.fsx(43,4,43,5): parse error FS0010: Unexpected symbol ')' in definition. E
 
 neg66.fsx(43,4,43,5): parse error FS0010: Unexpected symbol ')' in definition. Expected incomplete structured construct at or before this point or other token.
 
-neg66.fsx(30,1,38,33): typecheck error FS0003: This value is not a function and cannot be applied
+neg66.fsx(30,1,38,33): typecheck error FS0003: This value is not a function and cannot be applied.

tests/fsharp/typecheck/sigs/neg67.vsbsl

@@ -20,4 +20,4 @@ neg67.fsx(41,9,41,14): typecheck error FS0001: This expression was expected to h
 but here has type
     'Async<'a>'    
 
-neg67.fsx(30,1,41,37): typecheck error FS0003: This value is not a function and cannot be applied
+neg67.fsx(30,1,41,37): typecheck error FS0003: This value is not a function and cannot be applied.