fix formatting

README.md

@@ -5,17 +5,20 @@ We all remember problems we had in school, stated likes:
 > Alice recieve 10 candies from her grandmother and later gives 2 candies to Bob.
 > How many candies has Alice left ?
 
+We will walk through ERP5 business model and Inventory API using that problem as an example.
+The 5 base classes of ERP5, also called _Universal Business Model_ are shown in the picture below.
+
+![ERP5's 5 classes](https://www.erp5.com/developer-ERP5.UBM.Picture?quality=75.0&display=small&format=png "ERP5 5 classes")
+
 Using ERP5 Universal Business Model this simple problem will be modeled using:
  - resource: The resource are candies
  - node: Alice, Bob and the Grandmother are nodes
  - movements: When Alice gives 2 candies to Bob, there is a movement where Alice is _source_ and Bob is _destination_. The resource of this movement is candy.
 
-![ERP5's 5 classes](https://www.erp5.com/developer-ERP5.UBM.Picture?quality=75.0&display=small&format=png "ERP5 5 classes")
-
-In this problem, there are two movements:
+In our problem, there are two movements:
 
 | Movement | Source        | Destination   | Resource | Quantity  |
-|---------:| ------------- |------------- -| ---------| ---------:|
+| -------- | ------------- |-------------- | -------- | ---------:|
 |       M1 | Grandmother   | Alice         | Candy    |        10 |
 |       M2 | Alice         | Bob           | Candy    |         2 |
 
@@ -24,7 +27,7 @@ A simple solution to "how many candies Alice has left" is achived by summing the
 
 Which in pseudo SQL format, means:
 
-```#SQL
+```sql
 SELECT SUM(quantity) FROM movements WHERE Source = 'Alice'
 - SUM(quantity) FROM movements Where Destination = 'Alice'
 ```
@@ -38,7 +41,7 @@ The underlying idea of Inventory is to see all movements from the source's point
 We store the movements using the following data structure:
 
 | Movement | Node          | Mirror Node   | Resource | Quantity  |
-|---------:| ------------- |------------- -| ---------| ---------:|
+| -------- | ------------- | ------------- | -------- | ---------:|
 |       M1 | Grandmother   | Alice         | Candy    |       -10 |
 |       M1 | Alice         | Grandmother   | Candy    |        10 |
 |       M2 | Alice         | Bob           | Candy    |        -2 |
@@ -47,19 +50,20 @@ We store the movements using the following data structure:
 
 Using this data structure querying inventory of Alice is much efficient:
 
-```SQL
+```sql
 SELECT SUM(quantity) FROM stock WHERE Node = 'Alice'
 ```
 
 Using ERP5 API, this call would be :
 
-```#python
+```python
 return portal_simulation.getInventory(
    node_uid=alice.getUid()
 )
 ```
 
 
+
 ---
 
 ## Dates
@@ -78,7 +82,7 @@ Let's imagine that on Wednesday Alice send 3 candies to her cousin Carol that li
 
 
 | Movement | Node          | Mirror Node   | Resource | Quantity  | Date      |
-|---------:| ------------- |------------- -| ---------| ---------:|-----------|
+| -------- | ------------- | ------------- | -------- | ---------:| --------- |
 |       M1 | Grandmother   | Alice         | Candy    |       -10 | Monday    |
 |       M1 | Alice         | Grandmother   | Candy    |        10 | Monday    |
 |       M2 | Alice         | Bob           | Candy    |        -2 | Tuesday   |
@@ -88,23 +92,23 @@ Let's imagine that on Wednesday Alice send 3 candies to her cousin Carol that li
 
 In this table it, as easy to see that before Tuesday evening, Alice had 8 candies:
 
-```#python
+```python
 >>> getInventory(node=Alice, at_date=Tuesday)
 8 # M1 & M2
 ```
 
 Because under the hood, this will use a query like:
-```SQL
+```sql
 SELECT SUM(quantity) from stock where Node='Alice' and Date <= Monday
 ```
 
 On Wednesday evening, has only 5 Candies because the movement already decreased her stock
 
-```#python
+```python
 >>> getInventory(node=Alice, at_date=Tuesday)
 5 # M1 & M2 & M3
 ```
-```#SQL
+```sql
 SELECT SUM(quantity) from stock where Node='Alice' and Date <= Tuesday
 ```
 
@@ -113,16 +117,16 @@ But Carol's inventory of candies is still 0 on Wednesday:
 >>> getInventory(node=Carol, at_date=Wednesday)
 0
 ```
-```#SQL
+```sql
 SELECT SUM(quantity) from stock where Node='Carol' and Date <= Tuesday
 ```
 
 And this inventory is only increased on Thursday:
-```#python
+```python
 >>> getInventory(node=Carol, at_date=Thursday)
 3
 ```
-```#SQL
+```sql
 SELECT SUM(quantity) from stock where Node='Carol' and Date <= Thursday
 ```
 
@@ -174,7 +178,4 @@ linear movements
 
 
 
-# Tracking API
-
-
-
+# Tracking API
\ No newline at end of file