Update comment about -E in launcher scripts (#25873)

#25867 (comment)

Author: juj

bootstrap

@@ -11,7 +11,7 @@
 # To make modifications to this file, edit `tools/run_python.sh` and then run
 # `tools/maint/create_entry_points.py`
 
-# $_EM_PY -E does not ignore _PYTHON_SYSCONFIGDATA_NAME, an internal of cpython
+# python -E does not ignore _PYTHON_SYSCONFIGDATA_NAME, an internal of cpython
 # used in cross compilation via setup.py, so we unset it explicitly here.
 unset _PYTHON_SYSCONFIGDATA_NAME
 

em++

@@ -11,7 +11,7 @@
 # To make modifications to this file, edit `tools/maint/run_python_compiler.sh` and
 # then run `tools/maint/create_entry_points.py`
 
-# $_EM_PY -E will not ignore _PYTHON_SYSCONFIGDATA_NAME an internal
+# python -E will not ignore _PYTHON_SYSCONFIGDATA_NAME an internal
 # of cpython used in cross compilation via setup.py.
 unset _PYTHON_SYSCONFIGDATA_NAME
 

emcc

@@ -11,7 +11,7 @@
 # To make modifications to this file, edit `tools/maint/run_python_compiler.sh` and
 # then run `tools/maint/create_entry_points.py`
 
-# $_EM_PY -E will not ignore _PYTHON_SYSCONFIGDATA_NAME an internal
+# python -E will not ignore _PYTHON_SYSCONFIGDATA_NAME an internal
 # of cpython used in cross compilation via setup.py.
 unset _PYTHON_SYSCONFIGDATA_NAME
 

test/runner

@@ -11,7 +11,7 @@
 # To make modifications to this file, edit `tools/run_python.sh` and then run
 # `tools/maint/create_entry_points.py`
 
-# $_EM_PY -E does not ignore _PYTHON_SYSCONFIGDATA_NAME, an internal of cpython
+# python -E does not ignore _PYTHON_SYSCONFIGDATA_NAME, an internal of cpython
 # used in cross compilation via setup.py, so we unset it explicitly here.
 unset _PYTHON_SYSCONFIGDATA_NAME
 

tools/maint/run_python.sh

@@ -11,7 +11,7 @@
 # To make modifications to this file, edit `tools/run_python.sh` and then run
 # `tools/maint/create_entry_points.py`
 
-# $_EM_PY -E does not ignore _PYTHON_SYSCONFIGDATA_NAME, an internal of cpython
+# python -E does not ignore _PYTHON_SYSCONFIGDATA_NAME, an internal of cpython
 # used in cross compilation via setup.py, so we unset it explicitly here.
 unset _PYTHON_SYSCONFIGDATA_NAME
 

tools/maint/run_python_compiler.sh

@@ -11,7 +11,7 @@
 # To make modifications to this file, edit `tools/maint/run_python_compiler.sh` and
 # then run `tools/maint/create_entry_points.py`
 
-# $_EM_PY -E will not ignore _PYTHON_SYSCONFIGDATA_NAME an internal
+# python -E will not ignore _PYTHON_SYSCONFIGDATA_NAME an internal
 # of cpython used in cross compilation via setup.py.
 unset _PYTHON_SYSCONFIGDATA_NAME