WASM REPL: put demo at index.html and change text of the 'Run Code' button

Author: adqm

Makefile.pre.in

@@ -1096,7 +1096,7 @@ $(DLLLIBRARY) libpython$(LDVERSION).dll.a: $(LIBRARY_OBJS)
 # wasm32-emscripten browser web example
 
 WEBEX_DIR=$(srcdir)/Tools/wasm/emscripten/web_example/
-web_example/python.html: $(WEBEX_DIR)/python.html
+web_example/index.html: $(WEBEX_DIR)/index.html
 	@mkdir -p web_example
 	@cp $< $@
 
@@ -1124,7 +1124,7 @@ web_example/python.mjs web_example/python.wasm: $(BUILDPYTHON)
 	cp python.wasm web_example/python.wasm
 
 .PHONY: web_example
-web_example: web_example/python.mjs web_example/python.worker.mjs web_example/python.html web_example/server.py $(WEB_STDLIB)
+web_example: web_example/python.mjs web_example/python.worker.mjs web_example/index.html web_example/server.py $(WEB_STDLIB)
 
 ############################################################################
 # Header files

Tools/wasm/emscripten/web_example/python.html renamed to Tools/wasm/emscripten/web_example/index.html

@@ -604,7 +604,7 @@
         <h1>Simple REPL for Python WASM</h1>
         <div id="editor">print('Welcome to WASM!')</div>
         <div class="button-container">
-            <button id="run" disabled>Run</button>
+            <button id="run" disabled>Run Code</button>
             <button id="repl" disabled>Start REPL</button>
             <button id="stop" disabled>Stop</button>
             <button id="clear" disabled>Clear</button>