Aesthetic change to gitignore and suggest python3 -m pip instead of pip in Readme install instructions.

Author: yaphott

.gitignore

@@ -6,12 +6,12 @@
 !pyproject.toml
 !Makefile
 
-!tests/
-!tests/*
-
 !src/
 !src/*
 
+!tests/
+!tests/*
+
 !LICENSE
 !README.md
 !.gitignore

README.md

@@ -25,15 +25,15 @@ You should have received a copy of the GNU General Public License along with thi
 Most stable version from [**PyPi**](https://pypi.org/project/regex-toolkit/):
 
 ```bash
-pip install regex-toolkit
+python3 -m pip install regex-toolkit
 ```
 
 Development version from [**GitHub**](https://github.com/Phosmic/regex-toolkit):
 
 ```bash
 git clone git+https://github.com/Phosmic/regex-toolkit.git
 cd regex-toolkit
-pip install .
+python3 -m pip install .
 ```
 
 ## Usage