Merge pull request JuliaLang/JuliaSyntax.jl#440 from nhz2/patch-1

Update `Base.peek` docstring

Author: pfitzseb

JuliaSyntax/src/parse_stream.jl

@@ -475,7 +475,7 @@ end
 end
 
 """
-    peek(stream [, n=1]; skip_newlines=false)
+    peek(stream::ParseStream [, n=1]; skip_newlines=false)
 
 Look ahead in the stream `n` tokens, returning the token kind. Comments and
 non-newline whitespace are skipped automatically. Whitespace containing a