diff --git a/.gitattributes b/.gitattributes
index c8913e2..8ba09c5 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -8,4 +8,6 @@
 
 # Attributes for GitHub Linguist
 *.h linguist-language=c
-*.exp linguist-language=tcl
+tests/* linguist-detectable=false
+configure.ac linguist-detectable=false
+Makefile.am linguist-detectable=false
diff --git a/.travis.yml b/.travis.yml
index 405b0a8..b8d25dd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,7 +44,6 @@ script:
   - $GCOV_BIN src/*.c
   - sudo make install
   - command -v u6a u6ac
-# - whatis u6a u6ac      # broken on macOS...
 
 after_success:
   - test $TRAVIS_OS_NAME = osx && true || bash <(curl -s https://codecov.io/bash)
diff --git a/INSTALL b/INSTALL
index acb830b..cd88a55 100644
--- a/INSTALL
+++ b/INSTALL
@@ -32,6 +32,6 @@ U6A INSTALLATION GUIDELINES:
 
     make check
 
-7. Install executables and man pages.
+7. (Optional) Install executables and man pages.
 
     make install
diff --git a/README.md b/README.md
index 46dba1e..dd2eec7 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ this notice are preserved. This file is offered as-is, without any warranty.
 
 [![Travis CI](https://travis-ci.com/esolangs/u6a.svg)](https://travis-ci.com/esolangs/u6a)
 [![Codecov](https://codecov.io/gh/esolangs/u6a/branch/master/graphs/badge.svg)](https://codecov.io/gh/esolangs/u6a)
-[![LICENSE](https://img.shields.io/badge/licence-GPL--3.0--or--later-blue.svg)](LICENSE)
+[![LICENSE](https://img.shields.io/badge/license-GPL--3.0--or--later-blue.svg)](LICENSE)
 
 Implementation of Unlambda, an esoteric programming language.
 
diff --git a/man/u6ac.1 b/man/u6ac.1
index 2e73f38..af68c60 100644
--- a/man/u6ac.1
+++ b/man/u6ac.1
@@ -85,7 +85,7 @@ Other builtin function names are case-insensitive.
 Unlambda code size should not be larger than 4MiB (not counting comments and whitespaces).
 You may change this limit in
 .B defs.h
-and rebuild u6a for larger code to compile.
+and rebuild U6a for larger code to compile.
 .
 .SH SEE ALSO
 .BR u6a (1)