change help msg in READMe

README.md

@@ -48,11 +48,12 @@ beta 1 200       # fraction of people that have a piano
 =: piano_tuners
 ```
 
-If you type "help", you can see a small grammar:
+If you type "help" (or run fermi -h), you can see a small grammar and some optional command flags:
 
 ```
 $ fermi
-help
+
+1. Grammar:
   Operation | Variable assignment | Special
     Operation:                             operator operand
           operator:                        (empty) | * | / | + | -
@@ -61,8 +62,9 @@ help
             beta:                          beta alpha beta
     Variable assignment:                   =: variable_name
     Variable assignment and clear stack:   =. variable_name
-    Special:
+    Special commands:
          Comment:                          # this is a comment
+         Summary stats:                    stats
          Clear stack:                      clear | c | .
          Print debug info:                 debug | d
          Print help message:               help  | h
@@ -71,23 +73,31 @@ help
          Exit:                             exit  | e
   Examples:
     + 2
-                    # this is a comment
+    / 2.5
-    / 2.5           # this is an operation followed by a comment
+    * 1 10 (interpreted as lognormal)
-    * 1 10          # "low high" is interpreted as lognormal
     + 1 10
     * beta 1 10
-    1 10            # multiplication taken as default operation)
+    1 10 (multiplication taken as default operation)
-    =: x
+      =: x
-    .               # return the stack to 1.
+    .
     1 100
     + x
-    * 1 12 
+    # this is a comment
+    * 1 12 # this is an operation followed by a comment
     * (
     1 10
     + beta 1 100
     )
-    =. y            # save to variable and clear stack
     exit
+
+Command flags:
+  -echo
+        Specifies whether inputs should be echoed back. Useful if reading from a file
+.  -f string
+        Specifies a file with a model to run
+  -n int
+        Specifies the number of samples to draw when using samples (default 100000)
+  -h    Shows help message
 ```
 
 You can see real life examples [here](https://x.com/NunoSempere/status/1831106442721452312), [here](https://x.com/NunoSempere/status/1829525844169248912), [here](https://x.com/NunoSempere/status/1818810770932568308), [here](https://x.com/NunoSempere/status/1816605190415401100), [here](https://x.com/NunoSempere/status/1816604386703081894), [here](https://x.com/NunoSempere/status/1815169781907042504)