Remove 'selector-16' which the macos emoji picker inserts, and handle it being present

test/test-run

@@ -4,14 +4,60 @@ testDefiningALightningFunctionWorks() {
   echo '
   #!/usr/bin/env bash
 
-  ⚡️hello() { echo "Hello, World!" ; }
+  ⚡hello() { echo "Hello, World!" ; }
   ' > go
 
-  echo "source $REPO_ROOT/⚡️" >> go
+  echo "source $REPO_ROOT/⚡" >> go
   chmod +x go
 
   try ./go hello
   assertEquals "Hello, World!" "$STDOUT"
 }
 
+testReferingToALightningFunctionWorks() {
+  echo '
+  #!/usr/bin/env bash
+
+  ⚡goodbye() { echo Good Bye.; }
+  ⚡hello() { echo "Hello, World!" ; ⚡goodbye ; }
+  ' > go
+
+  echo "source $REPO_ROOT/⚡" >> go
+  chmod +x go
+
+  try ./go hello
+  assertContains "$STDOUT" "Hello, World!"
+  assertContains "$STDOUT" "Good Bye."
+}
+
+testDefiningALightningFunctionWorksWithSelector16() {
+  echo '
+  #!/usr/bin/env bash
+
+  ⚡️hello() { echo "Hello, World!" ; }
+  ' > go
+
+  echo "source $REPO_ROOT/⚡" >> go
+  chmod +x go
+
+  try ./go hello
+  assertEquals "Hello, World!" "$STDOUT"
+}
+
+testReferingToALightningFunctionWorksWithSelector16() {
+  echo '
+  #!/usr/bin/env bash
+
+  ⚡️goodbye() { echo Good Bye.; }
+  ⚡️hello() { echo "Hello, World!" ; ⚡️goodbye ; }
+  ' > go
+
+  echo "source $REPO_ROOT/⚡" >> go
+  chmod +x go
+
+  try ./go hello
+  assertContains "$STDOUT" "Hello, World!"
+  assertContains "$STDOUT" "Good Bye."
+}
+
 source $(dirname $0)/runner