Fix minor typos in docs

Signed-off-by: Arthit Suriyawongkul <[email protected]>

Author: bact

GETTING-STARTED.md

@@ -19,7 +19,7 @@ If you are using Maven, you can add the following dependency in your POM file:
 ## Using the library for license analysis
 
 The static class `org.spdx.library.model.license.LicenseInfoFactory` supports the parsing of
-  SPDX license expressions, creation, and comparison of SPDX licenses.
+SPDX license expressions, creation, and comparison of SPDX licenses.
 
 The `LicenseInfoFactory` will initialize the library and work with both the SPDX spec version 3
 and the SPDX spec version 2 license models.  SPDX spec version to methods end in `CompatV2`.
@@ -41,7 +41,7 @@ InMemSpdxStore modelStore = new InMemSpdxStore();
 IModelCopyManager copyManager = new ModelCopyManager();
 ```
 
-Many factory and helper methods in the library make use of a DefaultModelStore 
+Many factory and helper methods in the library make use of a DefaultModelStore
 if no model store or copy manager is specified.
 
 The `SpdxModelFactory.init()` will create defaults for this purpose.
@@ -55,7 +55,7 @@ DefaultModelStore.initialize(IModelStore newModelStore, String newDefaultDocumen
 
 The `newDefaultDocumentUri` is a default document URI used for SPDX Spec version 2 model objects.
 
-IMPORTANT NOTE: The call to `DefaultModelStore.initialize` must be made prior to or immediately after the call 
+IMPORTANT NOTE: The call to `DefaultModelStore.initialize` must be made prior to or immediately after the call
 to `SpdxModelFactory.init()`.  Otherwise, any data stored in the previous default model object will be lost.
 The `SpdxModelFactory.init()` will not overwrite an already initialized default model store.
 
@@ -121,10 +121,10 @@ The model store, creation info, copy manager, and prefix information will all be
 
 ### Programmatically Creating SPDX Data
 
-SPDX Spec version 2 stores all date within an SPDX document.  SPDX documents have a single document URI which is a 
-prefix for all IDs within the document.
+SPDX Spec version 2 stores all data within an SPDX document.
+SPDX documents have a single document URI which is a prefix for all IDs within the document.
 
-The SPDX document MUST be unique.
+The SPDX document URI MUST be unique.
 
 Below is an example:
 
@@ -171,4 +171,4 @@ We now need to add the required fields to make this a valid SPDX document:
 ```
 
 Similar to SPDX spec version 3, the create methods in the SPDX spec version 2 objects will copy the
-model store, copy manager, and document uri to the newly created objects.
+model store, copy manager, and document uri to the newly created objects.

README-SPI-MODEL-STORE.md

@@ -20,7 +20,7 @@ These methods should be used to avoid common errors when converting between supp
 
 ## Using the Serialization interfaces
 
-Note: You can extend the default org.spdx.storage.simple.InMemSpdxStore with a couple of serialization / de-serialization methods to implement a storage interface to a serializeable format (such as a JSON or YAML file).
+Note: You can extend the default org.spdx.storage.simple.InMemSpdxStore with a couple of serialization / de-serialization methods to implement a storage interface to a serializable format (such as a JSON or YAML file).
 
 ## Handling Collections of Values
 

README-V3-UPGRADE.md

@@ -60,7 +60,7 @@ SPDX 3.0.1 model objects can be found in packages underneath `org.spdx.library.m
 
 ## Changes to ExternalElement and ExternalExtractedLicenseInfo (SPDX Version 2.X classes)
 
-- Constructors changed to take the document URI for the document containing the external element or license.  This is different from the previous constructor which took the document URI of the document containing the reference and an ID of the form `DocumentRef-XX:[ID]`  To accomodate compatibility, the constructors
+- Constructors changed to take the document URI for the document containing the external element or license.  This is different from the previous constructor which took the document URI of the document containing the reference and an ID of the form `DocumentRef-XX:[ID]`  To accommodate compatibility, the constructors
 will check for the old DocumentRef format and attempt a conversion.
 - Added a method `referenceElementId(SpdxDocument documentReferencingExternal)` which will convert return the `DocumentRef-XX:[ID]`.  This should be used in place of the getId which previously returned this format.