Improve docs for -sEXPORT_EXCEPTION_HANDLING_HELPERS. NFC (#26009)

Author: kleisauke

site/source/docs/tools_reference/settings_reference.rst

@@ -1131,10 +1131,10 @@ the JS library:
   Given an WebAssembly.Exception object, returns the actual user-thrown C++
   object address in Wasm memory.
 
-Setting this option also adds refcount increasing and decreasing functions
-('incrementExceptionRefcount' and 'decrementExceptionRefcount') in the JS
-library because if you catch an exception from JS, you may need to manipulate
-the refcount manually not to leak memory.
+Setting this option also adds refcount incrementing and decrementing
+functions ('incrementExceptionRefcount' and 'decrementExceptionRefcount') in
+the JS library because if you catch an exception from JS, you may need to
+manipulate the refcount manually to avoid memory leaks.
 
 See test_EXPORT_EXCEPTION_HANDLING_HELPERS in test/test_core.py for an
 example usage.

src/settings.js

@@ -765,10 +765,10 @@ var DISABLE_EXCEPTION_THROWING = false;
 //   Given an WebAssembly.Exception object, returns the actual user-thrown C++
 //   object address in Wasm memory.
 //
-// Setting this option also adds refcount increasing and decreasing functions
-// ('incrementExceptionRefcount' and 'decrementExceptionRefcount') in the JS
-// library because if you catch an exception from JS, you may need to manipulate
-// the refcount manually not to leak memory.
+// Setting this option also adds refcount incrementing and decrementing
+// functions ('incrementExceptionRefcount' and 'decrementExceptionRefcount') in
+// the JS library because if you catch an exception from JS, you may need to
+// manipulate the refcount manually to avoid memory leaks.
 //
 // See test_EXPORT_EXCEPTION_HANDLING_HELPERS in test/test_core.py for an
 // example usage.

tools/link.py

@@ -1835,11 +1835,10 @@ def get_full_import_name(name):
     # enabling EH, errors out.
     if settings.DISABLE_EXCEPTION_CATCHING and not settings.WASM_EXCEPTIONS:
       exit_with_error('EXPORT_EXCEPTION_HANDLING_HELPERS requires either of -fexceptions or -fwasm-exceptions')
-    # We also export refcount increasing and decreasing functions because if you
-    # catch an exception, be it an Emscripten exception or a Wasm exception, in
-    # JS, you may need to manipulate the refcount manually not to leak memory.
-    # What you need to do is different depending on the kind of EH you use
-    # (https://github.com/emscripten-core/emscripten/issues/17115).
+    # We also export refcount incrementing and decrementing functions because if
+    # you catch an exception from JS, you may need to manipulate the refcount
+    # manually to avoid memory leaks.  See test_EXPORT_EXCEPTION_HANDLING_HELPERS
+    # in test/test_core.py for an example usage.
     settings.EXPORTED_FUNCTIONS += ['getExceptionMessage', 'incrementExceptionRefcount', 'decrementExceptionRefcount']
     if settings.WASM_EXCEPTIONS:
       settings.REQUIRED_EXPORTS += ['__cpp_exception']