Readme updates - line length

Author: drobnyjt

README.md

@@ -12,8 +12,8 @@ By discretizing the collision cascade into a sequence of binary collisions,
 between an energetic ion and a target material. This includes reflection,
 implantation, and transmission of the incident ion, as well as sputtering
 and displacement damage of the target. Generally, [BCA] codes can be
-valid for incident ion energies between approximately ~1 eV/nucleon 
-to <1 GeV/nucleon. Improvements to RustBCA have expanded the regime
+valid for incident ion energies between several eV/nucleon  to 
+<1 GeV/nucleon. Improvements to RustBCA have expanded the regime
 of validity for some quantities, such as reflection coefficients, below 
 1 eV/nucleon for some ion/target pairs.
 
@@ -35,8 +35,10 @@ Selected citations of RustBCA as of 5/24/23:
 ## Getting started
 
 The easiest way to get started is with the ergonomic Python functions.
-These functions use the default RustBCA options detailed on the [Input Files](https://github.com/lcpp-org/RustBCA/wiki/Standalone-Code:-Input-File) page, which are not universally applicable.
-These examples use example material parameters located in `scripts/materials.py` which should be verified before use.
+These functions use the default RustBCA options detailed on the
+[Input Files](https://github.com/lcpp-org/RustBCA/wiki/Standalone-Code:-Input-File) page, which are not universally applicable.
+These examples use example material parameters located in
+`scripts/materials.py` that should be verified before use.
 Follow these steps to install, build, and run simple RustBCA simulations
 for sputtering yields and reflection coefficients:
 ```