Testing. Cosmetic.

* Install `swig` rather than `swig3.0` in Github Actions

* Minor update to `swig/Readme.md`

.github/workflows/c-cpp.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: dependencies
-      run: sudo DEBIAN_FRONTEND=noninteractive apt-get install -y yaggo gettext swig3.0 python3-dev ruby-dev libperl-dev
+      run: sudo DEBIAN_FRONTEND=noninteractive apt-get install -y yaggo gettext swig python3-dev ruby-dev libperl-dev
     - name: autotools
       run: autoreconf -fi
     - name: configure

.gitignore

@@ -14,3 +14,5 @@ ltmain.sh
 *_cmdline.hpp
 test-driver
 build-*
+*~
+compile_commands.json

swig/Readme.md

@@ -10,9 +10,9 @@ somewhat slower.
 Installation
 ============
 
-See the installation instructions on the
-[main page](../../tree/master) on how to install the bindings at the
-same times as Jellyfish.
+See the installation instructions on the [main page](../../tree/master) on how
+to install the bindings at the same times as Jellyfish. This is the suggested
+way to install the binding.
 
 Additionally, it is possible to install the bindings from the
 distribution tarball. If Jellyfish is already installed (that is