Update guide.md

docs/src/guide.md

@@ -8,10 +8,10 @@ The workflow is shown in the following figure. We will discuss each step in the
 
 
 ## Excel input
-To generate code for the model user supplies an Excel file `model_config.xlsx` to SedTrace, including the following spreadsheets. The `substances` sheet lists the modelled substances, their types (e.g., solid or dissolved), chemical formula and boundary conditions. The `reactions` sheet lists the reactions, their chemical equations and rate expressions. The `speciation` sheet lists aqueous speciation reactions. The `adsorption` sheet lists the adsorbed species. The `diffusion` sheet  lists information to compute the diffusion coefficients of dissolved substances. The `parameters` sheet lists the parameters required by the model. The `output` sheet  is used to formulate output and plotting. The `data` sheet  includes observational data that will be plotted together with model outputs. The `speciation`, `adsorption` and `data` sheets are optional and can be left empty if not needed (but their column headers must be preserved).
+To generate code for the model user supplies an Excel file `model_config.xlsx` to SedTrace, including the following spreadsheets. The `substances` sheet lists the modelled substances, their types (e.g., solid or dissolved), chemical formula and boundary conditions. The `reactions` sheet lists the reactions, their chemical equations and rate expressions. The `speciation` sheet lists aqueous speciation reactions. The `adsorption` sheet lists the adsorbed species. The `diffusion` sheet  lists information to compute the diffusion coefficients of dissolved substances. The `parameters` sheet lists the parameters required by the model. The `output` sheet  is used to formulate output and plotting. The `data` sheet  includes observational data that will be plotted together with model outputs. The `speciation`, `adsorption` and `data` sheets are optional and can be left empty if not needed (but their column headers must be preserved). Go to an example in `/SedTrace/examples` directory to see how to set up the configuration file.
 
 ## Main.jl
-This is the Julia script that you can used to generate code and run model simulations.
+This is the Julia script that you can use to generate code and run model simulations.
 
 ## Code generation 
 First, configure the model input using `modelconfig = ModelConfig(modeldirectory, modelfile, modelname)`, supplying information of the directory of the Excel input file, the name of the Excel file (e.g., `model_config.SimpleFe.xlsx`) and the model name (e.g., `SimpleFe`). Code generation is done by calling `generate_code(modelconfig; ParamDict::Dictionary, EnableList::Dictionary)`.