Change "eg" to "e.g." and fix punctuation

custom_mutators/gramatron/README.md

@@ -28,18 +28,20 @@ afl-fuzz -i in -o out -- ./target
 - Specify in a JSON format for CFG. Examples are correspond `source.json` files
 - Run the automaton generation script (in `src/gramfuzz-mutator/preprocess`)
   which will place the generated automaton in the same folder.
+
 ```
 ./preprocess/prep_automaton.sh <grammar_file> <start_symbol> [stack_limit]
 
-Eg. ./preprocess/prep_automaton.sh ~/grammars/ruby/source.json PROGRAM
+E.g., ./preprocess/prep_automaton.sh ~/grammars/ruby/source.json PROGRAM
 ```
 - If the grammar has no self-embedding rules then you do not need to pass the
   stack limit parameter. However, if it does have self-embedding rules then you
   need to pass the stack limit parameter. We recommend starting with `5` and
   then increasing it if you need more complexity
 - To sanity-check that the automaton is generating inputs as expected you can use the `test` binary housed in `src/gramfuzz-mutator`
+
 ```
 ./test SanityCheck <automaton_file>
 
-Eg. ./test SanityCheck ~/grammars/ruby/source_automata.json
-```
+E.g., ./test SanityCheck ~/grammars/ruby/source_automata.json
+```