changed small thing in code snippet for reaction smile conversion

split/seperated reaction components by . to avoid complication with positvely charged ions (e.g. H+)

README.md

@@ -44,9 +44,9 @@ e.g. for the carbonic anhydrase reaction: ```r2sO.COO>>HCOOO.[H+]</s>```
 or via this simple python script:
 
 ```python
-#  left reactants (seperated by +) seperated by a equal sign from the products (seperated by +)
-reactions =  "CO2 + H2O =  carbonic acid + H+"
-# agents (seperated by +) 
+#  left reactants (seperated by .) seperated by a equal sign from the products (seperated by .)
+reactions =  "CO2 . H2O =  carbonic acid . H+"
+# agents (seperated by .) 
 agent = ""
 
 # https://stackoverflow.com/questions/54930121/converting-molecule-name-to-smiles
@@ -61,9 +61,9 @@ def CIRconvert(ids):
     except:
         return 'Did not work'
 
-reagent = [CIRconvert(i) for i in reactions.replace(' ','').split('=')[0].split('+') if i != ""]
-agent = [CIRconvert(i) for i in agent.replace(' ','').split('+') if i != ""]
-product = [CIRconvert(i) for i in reactions.replace(' ','').split('=')[1].split('+') if i != ""]
+reagent = [CIRconvert(i) for i in reactions.replace(' ','').split('=')[0].split('.') if i != ""]
+agent = [CIRconvert(i) for i in agent.replace(' ','').split('.') if i != ""]
+product = [CIRconvert(i) for i in reactions.replace(' ','').split('=')[1].split('.') if i != ""]
 f"r2s{'.'.join(reagent)}>{'.'.join(agent)}>{'.'.join(product)}</s>"
 ```