An '&' means 'Join the next line to the end of the current line'. In the following example keyword REF is followed by the paths and names of several folders. By using ampersands these paths and names can be put on consecutive lines, making them much easier to read. Whitespace between the last printed character and the ampersand is eliminated. If the next line starts with whitespace, that whitespace will also be eliminated. Most keywords should not be split across lines, however keywords that involve quoted text, as in paths and filenames, can be split at the starting quotation mark. If a path or filename is not quoted, and an ampersand is used, simply add quotation marks.
Example
ref= & "../../reference data/Data Intermolecular interactions/S22 Intermolecular"; & "../../reference data/Data Intermolecular interactions/S22 Separated"; & * * The folder name on the next line normally would not have quotation marks around it, * but because the previous line ended in an ampersand the next line needs to start * with a quotation mark, otherwise a space would be inserted to indicate the start * of a new keyword * "local_files"; & "../../reference data/Data Intermolecular interactions/S66 Intermolecular"; & "../../reference data/Data Intermolecular interactions/S66 Separated"; & "../../reference data/Data Intermolecular interactions/L7 Intermolecular"; & "../../reference data/Data Intermolecular interactions/L7 Separated"; & "../../reference data/Data Intermolecular interactions/S12L Intermolecular"; & "../../reference data/Data Intermolecular interactions/X40 Separated"; & "../../reference data/Data Intermolecular interactions/X40 intermolecular"; & "../../reference data/Data Intermolecular interactions/Water dimers all"; & "../../reference data/Data Intermolecular interactions/D3H4 Ionic Intermolecular"; & "../../reference data/Data Intermolecular interactions/D3H4 Ionic Separated"; & "../../reference data/Data normal"; & "../../reference data/Data levels"; & "../../reference data/Data erratic" &