remove Unicode emoji's, and trim whitespace

Author: dimpase

src/doc/en/developer/portability_testing.rst

@@ -1169,9 +1169,9 @@ Here we give a very short sampling of ``act``'s capabilities. If you installed s
 After the set up, one can e.g. list all the available linting actions::
 
     [alice@localhost sage]$ gh act -l | grep lint
-    0      lint-pycodestyle        Code style check with pycodestyle                          Lint                                               lint.yml                push,pull_request                                      
-    0      lint-relint             Code style check with relint                               Lint                                               lint.yml                push,pull_request                                      
-    0      lint-rst                Validate docstring markup as RST                           Lint                                               lint.yml                push,pull_request 
+    0      lint-pycodestyle        Code style check with pycodestyle                          Lint                                               lint.yml                push,pull_request
+    0      lint-relint             Code style check with relint                               Lint                                               lint.yml                push,pull_request
+    0      lint-rst                Validate docstring markup as RST                           Lint                                               lint.yml                push,pull_request
     [alice@localhost sage]$
 
 run a particular action ``lint-rst`` ::
@@ -1185,17 +1185,17 @@ By default, ``act`` pulls all the data needed from the next, but it can also cac
 speeding up repeated runs quite a lot. The following repeats running of ``lint-rst`` using cached data::
 
     [alice@localhost sage]$ gh act -p false -r -j lint-rst
-    [Lint/Validate docstring markup as RST] 🚀  Start image=catthehacker/ubuntu:act-latest
+    [Lint/Validate docstring markup as RST]   Start image=catthehacker/ubuntu:act-latest
     ...
     | rst: commands[0] /home/alice/work/software/sage/src> flake8 --select=RST
     |   rst: OK (472.60=setup[0.09]+cmd[472.51] seconds)
     |   congratulations :) (474.10 seconds)
     ...
-    [Lint/Validate docstring markup as RST]   ✅  Success - Main Lint using tox -e rst
-    [Lint/Validate docstring markup as RST] ⭐ Run Post Set up Python
-    [Lint/Validate docstring markup as RST]   🐳  docker exec cmd=[node /var/run/act/actions/actions-setup-python@v4/dist/cache-save/index.js] user= workdir=
-    [Lint/Validate docstring markup as RST]   ✅  Success - Post Set up Python
-    [Lint/Validate docstring markup as RST] 🏁  Job succeeded
+    [Lint/Validate docstring markup as RST]     Success - Main Lint using tox -e rst
+    [Lint/Validate docstring markup as RST]  Run Post Set up Python
+    [Lint/Validate docstring markup as RST]     docker exec cmd=[node /var/run/act/actions/actions-setup-python@v4/dist/cache-save/index.js] user= workdir=
+    [Lint/Validate docstring markup as RST]     Success - Post Set up Python
+    [Lint/Validate docstring markup as RST]   Job succeeded
 
 Here ``-p false`` means using already pulled Docker images, and ``-r`` means do not remove Docker images
 after a successful run which used them. This, and many more details, can be found by running ``gh act -h``, as well