fix format in R's readme.

R-package/README.md

@@ -61,7 +61,7 @@ options(devtools.install.args = "--no-multiarch") # if you have 64-bit R only, y
 install_github("Microsoft/LightGBM", subdir = "R-package")
 ```
 
-If you are using a precompiled dll/lib locally, you can move the dll/lib into LightGBM root folder, modify `LightGBM/R-package/src/install.libs.R`'s 2nd line (change `use_precompile <- FALSE` to `use_precompile <- TRUE`), and install R-package as usual. ** NOTE: If your R version is not smaller than 3.5.0, you should set `DUSE_R35=ON` in cmake options when build precompiled dll/lib **.
+If you are using a precompiled dll/lib locally, you can move the dll/lib into LightGBM root folder, modify `LightGBM/R-package/src/install.libs.R`'s 2nd line (change `use_precompile <- FALSE` to `use_precompile <- TRUE`), and install R-package as usual. **NOTE: If your R version is not smaller than 3.5.0, you should set `DUSE_R35=ON` in cmake options when build precompiled dll/lib**.
 
 When your package installation is done, you can check quickly if your LightGBM R package is working by running the following: